Zhang Hua s living room is rectangular, 630 centimeters long and 330 centimeters wide. When renovati

First, find the total area as 630 times 330 equals 20790

Then since the decorative strip is 15 cm wide bai, du and all four sides have to be pasted, so the length dao should be subtracted from two 15 cm. The width should also be subtracted by two 15 centimeters, and the length obtained after cutting is multiplied by the width to get the area without stickers, that is, 600 times 300 equals 180,000

Finally, subtract the area without the line from the total area, that is, 20790 minus 180000 equals 27900, which is the area at the line.

630/15=42

42+22)*15*2=1920 (square centimeters) if it's good, vote for me!!

I think it's 15 by 15, and I'm writing about it right now.